There is a possibility that the tumor has metastasized to Primula's lungs.
From the official website of Ueno Zoo.
It has been confirmed that Primula may have metastasized to the lungs.
At present, there are no major changes in her overall condition, such as appetite, or in her behavior. Going forward, in order to focus on detailed examinations and treatment, she will be moved to care in a restricted area. For that reason, Primula's public display will end on Sunday, August 30.
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It will be sad not to be able to see Primula anymore, but I’m sure she’ll receive proper treatment 😢

Primula in Ueno Zoological Gardens, August 14, 2026
About the Pallas's cat "Primula" (Updated 8/18: End of Primula's public display) https://share.google/hoc7Apyy9zszTwzOM
Comments 23
Don’t get sick, kitty.
(radiates beams of health toward Primula)
Primula, please survive this! Stay strong and be healthy!😭😭😭
Primula, please get well soon. I trust your keepers to take care of you. I am sending power your way
Primula, get well soon 🙏🙏🙏 You will be deeply missed 😢
Rest well Primula. I hope she can heal and live in good health again.
Oh Primula please be well... We all love you and are cheering you on!! 💚💚💚
Stay strong and keep fighting, our beautiful Primula🙏 May treatment and care help🤞
I hope they help her🥺
Health to Primula!
Health, sunshine Primula!
I'm absolutely devastated by the news. She has to be well. Just. has to. Please
Primula, our girl❤️
Get well soon 🙏
I went to Ueno this April, and although I was able to see Mr. Klyon, Pri wouldn’t come out of the nest box... even though I’d been hoping to see him next time 😭
In any case, I really hope he gets plenty of rest and recovers well.
Health to you, Primula-san!
I hope everything will be all right. You can live quite well with a benign tumor, provided it doesn’t grow. So I’ll keep hoping for the best.
Primula already feels like family. I think I’d recognize her by her face, and by her unmistakable expression. So the news was very upsetting...
Dear Primula, you are a true fighter! You’ve already beaten that nasty cancer once, and you’ll beat it again 🙏
Perhaps outside the exhibit Primula will be calmer. I really liked how she handled the amputation, recovered, and looked great. Wishing you health, Primula. Such a wonderful daughter of Lev and mother of Nara, Minya, Figa, Abrikoska, and Shafran.
Noooo Primula 😭😭😭 please be well soon
Anything but this 😭 Primula, get well soon, our little sunshine 🙏
Primula, our dear, incredible girl and the most important mother!! Please get better, because you’re so resilient! Wishing you all the health of a manul! I’ll understand if you stay resting and recovering in the indoor enclosure -- as long as you feel well! But I’ll be endlessly happy to see you again and again in good health and good spirits! We love you very much, our faraway furry friend!
So sad to hear this. Thanks for all the joy you spread, even with your condition. Now you can rest and focus on staying healthy, we wish you the best of the best ❤️
Nooooo, Primula! 😭😭😭 Poor girl, get well and stay healthy! ❤️🩹🌼
Thanks to the zoo for its openness and timely updates.
Primula, get well soon :(